A blast rocked Baghdad's northeastern Sadr City district on Thursday, but there were differing accounts on whether it caused any casualties.
Police Colonel Jamal Hameed told Reuters a parcel had been found on the side of the road near a market and detonated in a controlled explosion, hurting no one.
He said an earlier statement by the joint military-police Baghdad Operations Command mentioning a suicide bomb and several deaths had been released in error.
That statement had said a bomber detonated an explosive belt surrounded by security forces. Local media reported that at least eight people were killed. Reuters was unable to independently verify whether there were any casualties.
The blast hit days after the start of the holy month of Ramadan, when Muslims fast from dawn to sunset and tend to congregate in public places after breaking their fast.